The Randomized Controlled Study of B-ultrasound and X-ray Locating Minimally Invasive Percutaneous Nephrolithotomy in Treatment of Urinary Tract Stones

Objective: To compare the clinical effect of B-ultrasound and X-ray locating minimally invasive percutaneous nephrolithotomy in treatment of urinary tract stones. Methods: 190 cases with urinary tract stones were selected from our hospital from March 2010 to September 2012, and they were divided into the study group and the control group according to a random number table,with 95 cases in each group. The patients of the control group were treated with X-ray locating minimally invasive percutaneous nephrolithotomy, while the patients of the study group were treated with B-ultrasound locating minimally invasive percutaneous nephrolithotomy, and the two groups were each subdivided into obesity group and normal group, the stone clearance rate, the operative time, blood loss, length of stay, incidence of complications and puncture positioning time of the two groups were compared. Results: The stone clearance rate of the study group were significantly higher than that of the control group, the difference was statistically significant(X2=10.751, P=0.024); The operative time, blood loss, length of stay of the study group were significantly better than that of the control group, the difference was statistically significant(t=9.214, 9.013, 10.012, P=0.012, 0.015, 0.009); There were no serious complications,the complication rate of the two groups was not statistically significant(X2=3.120, P=0.120). The puncture locating time of obesity group of study group was significantly longer than the normal group, and the difference was statistically significant(t=22.939, P=0.003), and also longer than that of the obesity group of control group, and the difference was statistically significant(t=10.979, P=0.009). Conclusion:B-ultrasound locating minimally invasive percutaneous nephrolithotomy has better effect, with high clearance rate and little harm to patients, and it is conducive to the rehabilitation of patients. For obese patients, ultrasound locating shows no advantage over the X-ray method.